JPS6028165Y2 - Protection device for rotary tiller shaft bearing body - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a protection device for a tiller shaft bearing of a rotary tiller towed by an agricultural tractor.

<Prior art> The rotor, a bearing body that pivotally supports the tilling shaft of a tillage device, is provided at the lower end of the side frame, and does not collide with a ridge, ridge, etc. that protrudes outward from the outer surface of the side frame. It was easy to damage.

Therefore, a protection device has been devised to protect this bearing body.

As a conventional technology regarding this type of protection device,
The one described in Japanese Patent No.-144401 is known.

In the above-mentioned conventional tiller, a protective cover covering at least the bottom of the case is attached to the lower end of the rotary case that pivotally supports the tilling shaft of the side-drive tiller using bolts and nuts.

<Problems to be solved by the invention> In the conventional type, the protective cover covers the case from the end of the tilling shaft inside the rotary case, so when the protective cover is replaced due to damage, the tilling The shaft had to be disassembled, making disassembly and assembly difficult.

Furthermore, since the protective cover covers the inside of the rotary case, its shape is complicated, making it difficult to manufacture and increasing costs.

Furthermore, there was a problem in that soil etc. remained inside the protective cover.

<Means for solving the problems> The present invention takes the following measures to solve the above problems.

That is, the feature of the present invention is that the protection device covers the bearing body provided at the lower end of the side frame with a protector to horizontally support the tilling shaft in the left-right direction. A protrusion that protrudes outward in the left and right direction is provided on the part, a bearing body is located between the protrusions, and the protection body is formed by forming a round bar into a U shape to cover the lower part of the bearing body. The body is attached to the side frame, and the front and rear portions of the protector overlap the protruding portion of the frame in the front-rear direction.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the drawings to FIG. 3, reference numeral 1 denotes a side-drive type tilling device, which is attached to an agricultural tractor via a three-point link.

The tillage device 1 is generally composed of a gear case section 2 that inputs the transmission of driving force from the PTO shaft of an agricultural tractor, a support body 3, a pair of left and right side frames 4L, 4R, and a tillage rotary 5, and is supported from the gear case section 2 on the left and right. The body 3 protrudes from the end of each support body 3 to a side frame 4L.
, 4R is lower.

In the illustrated example, one side frame 4R has protrusions 6, 6 bent laterally in the left-right direction at both ends in the width direction (front-back direction), and has a U-shaped cross section.

A transmission case 7 is attached to the entire outer surface of the other side frame 4L, and a bearing case 8L is attached to the inner surface with its axis aligned with a through hole provided at the lower end.

The lower end of the side frame 4R is also provided with a through hole 9 corresponding to the through hole, as shown in FIG. A bearing cover 10 is fixed to the outer surface of the case 8R through bolts 11.

A bearing 12 is built into these bearing cases 8L and 8R.

A bearing body 13 is composed of a bearing case 8, a bearing cover 10, a bearing 12, and the like.

Thus, the rotary shaft 14 for the tilling rotary is installed substantially horizontally in the left and right direction by these bearing bodies 13 and 13.

The bearing body 13 on one side frame 4R side has a protrusion 6,
It is located between 6.

The rotating shaft 14 is provided with end shafts 14a that fit into the bearings 12 at both ends thereof by bolted flanges.

A large number of tilling claws 15 are protruded from the rotating shaft 14, forming a tilling rotary 5.

A chain wheel is provided at the end of the rotating shaft 14 on the side having the transmission case 7, and rotational force is applied by the driving force transmitted from the tractor PTO shaft via the chain wrapped inside the transmission case 7.

The tilling rotary 5 is also provided with a rotary cover 16 that can be opened and closed from the top to the rear.

Reference numeral 17 denotes a protector, which is provided on the outside of the bearing cover 10.

The protector 17 covers the front and rear surfaces 18 and 18 of the bearing cover 10 in the direction of movement of the tilling device and the bottom surface 19, and the outer end surface 20 of the protector 17 in the left and right direction is the outer end surface 2 of the bearing cover 10 in the left and right direction.
] It is formed so as to be located further outward.

These protectors 17 and attachment means for the protectors 17 serve as a protector 22 for the bearing body 13.

FIG. 4 shows details of the protection device 22. The protection body 17 is made by bending a round bar into a U-shape, and the upper end portions 28 and 28 are connected by a mounting plate 24. A mounting hole 25 is bored.

When fixing the protector 17 to the outer surface of the bearing cover 10 through the mounting hole 25 with the bolt 11 on the upper part of the bearing body 13,
The bottom of the U-shaped portion is bent to surround the lower region of the bearing cover 10.

In this case, a semicircular notch is provided at the bottom of the mounting plate 24 so that the mounting plate 24 does not come into contact with the outer end surface 21 or the upper circumferential surface of the central protrusion of the bearing cover 10.

Further, the protector 17 is narrower than the inner surface of the protrusions 6, 6 of the side frame 4R.

According to this embodiment, there is no need to change the shape of the bearing body 13 in order to attach the protector 17, and it is not necessary to remove all the bolts 11 connecting the side frame 4R and the bearing body 13 when attaching or removing the protector 17. Since there is no side frame 4R and bearing body 1
It is preferable that there is no change in the relative position of No. 3, which does not affect the mounting accuracy.

Furthermore, it is advantageous to make the front and rear outer surfaces 26, 26 of the protector 17 abut against the inner surfaces 27, 27 of the protrusion, respectively, as this will also serve as reinforcement for the protrusion 6.

Furthermore, since the protector 17 is a round bar, soil and the like do not accumulate on the protector 17 during tilling work, which is convenient.

In the embodiment, the means for fixing the protector 17 is the existing bearing body 1.
The protector 17 may be attached and detached by an independent fixing means with or without using the bolt 11 for the protector 17.
Through holes corresponding to the front and rear portions 26 of the side frame 4R and the protruding portion 6 of the side frame 4R may be provided and fastened with bolts.

Furthermore, the illustrated protector 17 may be turned upside down and attached to the outer surface of the bearing cover 10 through the attachment hole 25 using the bolts 11 at the lower part of the bearing body 13.

Further, the cross section of each part of the protector 17 may be rectangular or the like.

According to the present invention, the protector 17 for the bearing body 13 can be provided without changing the shape of the bearing body 13 of the tillage device 1, and the bearing body 13 can be prevented from colliding with a ridge or the like during tilling work. Even if the bearing body 13 is
In addition, even if the protector 17 is worn or damaged as a result of repeated sliding friction against the ridges, etc. on the front and rear surfaces 26 in the direction of movement and the bottom surface while protecting the bearing cover 10, , can be easily replaced, and the bearing body 13
protection can be maintained for a long time.

Moreover, since the protector 17 has a simple structure, it is easy to manufacture and can exhibit various practical effects.

Furthermore, since the protector 17 is a round bar, it is convenient because soil etc. do not accumulate in the protector 17 during tilling work, and the front and rear parts 26 of the protector 17 and the protrusion 6 of the frame 4R wrap in the front and rear direction. Therefore, the protrusion 6 is reinforced.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, Fig. 1 shows a rear view of a side drive type tilling device using the present invention, Fig. 2 is a sectional view of the main part of Fig. 1, and Fig. 3 FIG. 4 is a side view of the figure, and FIG. 4 is a perspective view of an assembly procedure showing an embodiment of the present invention. 1... Cultivation device, 4R... Curved side frame,
5... Cultivation rotary, 6, 6... Protrusion, 1o... Curved bearing cover, 13... Bearing body,
14・Rotating axis, 17...Protective body, 22...
・・・Protective device, 26・Curve・Front and rear of the protective body.

Claims (1)

[Scope of Claim for Utility Model Registration] In a protection device that covers a bearing body provided at the lower end of a side frame to horizontally support a tilling shaft in the left-right direction, Projections 6, 6 projecting outward in the direction are provided, a bearing body 13 is located between the projections 6, 6, and a protector 17 is formed from a round bar into a U shape to cover the lower part of the bearing body 13. A rotary tilling device characterized in that the protector 17 is attached to the side frame 4R, and the front and rear portions 26, 26 of the protector 17 wrap between the protruding parts 6, 6 of the frame and in the front-rear direction. A protection device for the tillage shaft bearing body.